The first are from Trick Flow. $100
These are the "tall" valve covers and are brand spanking new. I would return them to Summit, but they've been sitting on the shelf for too long (a sign that I need to hurry up with this project) and now they wont take them back. After tax, shipping, etc, these would be right at $150 new from Summit. http://www.summitracing.com/parts/TFS-51411802/
The second are a no-name set. $60
These are used. There are holes drilled in each of them (for a filler neck or a breather).